Nope... when you add album art to a song it adds that to the music file itself (like I said in the "useless" post above )... you can copy it from the album art window in iTunes, though, by right/ctrl-click the art (see attachment)... then you can use e.g. Preview to make a new file from clipboard...

If you want album art (of fairly high quality = wallpaper size) you need to look elsewhere... unless you want to make a collage like the iTunes screen saver or something...

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